When uploading a show, which option allows for streaming the content along with DLing it? Is it the recommended option? Is there a lag between when the item is available and when the stream feature is there?
Yes, the recommended option is what allows streaming. And yes, there's a lag between the show going public and the mp3's/oggs/streams showing up. The FLAC/SHNs are available for downloading immediately, but it takes a while to generate the derivatives.